ipwf.exe is a Trojan.Dloader-YF. ipwf.exe opens a back door. Related files: %System%\ipwf.exe %System%\drivers\winut.dat More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill ipwf.exe process and remove ipwf.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.